Please help. I need help with a couple of questions. I will give medal and fan.

- anonymous

Please help. I need help with a couple of questions. I will give medal and fan.

- katieb

See more answers at brainly.com

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

A toy rocket was launched from the ground. The function f(x) = -16x^2 + 192x shows the height of the rocket f(x), in feet, from the ground at time x seconds.
What is the axis of symmetry of the graph of f(x), and what does it represent?
x = 12; it takes 12 seconds to reach the maximum height and 12 seconds to fall back to the ground
x = 12; it takes 12 seconds to reach the maximum height and 24 seconds to fall back to the ground
x = 6; it takes 6 seconds to reach the maximum height and 6 seconds to fall back to the ground
x = 6; it takes 6 seconds to reach the maximum height and 3 seconds to fall back to the ground

- anonymous

I think its either C or D

- anonymous

i think it is not a 100% sure though

Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

- anonymous

can you help me with a couple more?

- anonymous

yeah i will try

- anonymous

Functions f(x) and g(x) are shown below:
f(x) = x2
g(x) = x2 + 10x + 25
In which direction and by how many units should f(x) be shifted to obtain g(x)?
Right by 5 units
Left by 5 units
Right by 10 units
Left by 10 units

- Vocaloid

hint: (x^2 + 10x + 25) = (x+5)^2

- anonymous

so would it be D?

- Vocaloid

nope, please look carefully at what I wrote
(x+k)^2 moves the graph x^2 to the left k units

- anonymous

OK, B?

- Vocaloid

yes, B is the answer, but do you understand how to get (x+5)^2?

- anonymous

can you explain it a little, I sort of forgot.

- Vocaloid

have you seen this formula?
(a+b)^2 = a^2 + 2ab + b^2?

- anonymous

yes

- Vocaloid

great! in the equation x^2 + 10x + 25, do you see how x = a and b = 5? when you plug in x for a and b for 5, do you see how x^2 + 10x + 25 = (x+5)^2?
this is called "factoring", basically you want to find a and b so you can simplify x^2 + 10x + 25 into (x+5)^2

- anonymous

oh, I remember thanks!

- anonymous

do you mind helping me with a couple more?

- Vocaloid

sure, I guess

- anonymous

The steps to derive the quadratic formula are shown below:
Which of the following statements best describes the first incorrect step?
In Step 4, square of quantity of b over 2 times a instead of b over 2 times a was added on both sides.
In Step 5, x plus b over 2 times a, all squared was written instead of x plus b over 4a, all square.
In Step 6, c over a was written instead of -c over a inside the root.
In Step 7, square of quantity of b over 2 times a was written instead of b over 2 times a inside the root.

##### 1 Attachment

- Vocaloid

http://www.purplemath.com/modules/sqrquad2.htm

##### 1 Attachment

- Vocaloid

NOTE: I got this from a website, I didn't write this out myself, but these are the steps to derive the quadratic equation

- anonymous

David kicks a soccer ball off the ground and in the air, with an initial velocity of 35 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

- anonymous

for this one I know you plug in the 35 for v but what do you plug in for s?

- Vocaloid

v = initial velocity = 35, s = initial height = 0

- Vocaloid

an object on the ground has a height of 0

- Vocaloid

initial height = 0, because the ball is on the ground

- anonymous

ok I can do this one by myself

- Vocaloid

k cool

- anonymous

can you help me with 3 more?

- Vocaloid

ok

- anonymous

Water coming out from a fountain is modeled by the function f(x) = -x2 + 7x + 5 where f(x) represents the height, in feet, of the water from the fountain at different times x, in seconds.
What does the average rate of change of f(x) from x = 4 to x = 6 represent?
The water falls down with an average speed of 5 feet per second from 4 seconds to 6 seconds.
The water falls down with an average speed of 3 feet per second from 4 seconds to 6 seconds.
The water travels an average distance of 5 feet from 4 seconds to 6 seconds.
The water travels an average distance of 3 feet from 4 seconds to 6 seconds.

- anonymous

If 5p = -100 + 3Q2, which of the following could Q possibly be?
Q = square root of 5p-100/ 3
Q = square root of 5p+100/3
Q = square root of -5p+100/ 3
Q = square root of -5p-100/ 3

- Vocaloid

this one is a bit tough to explain but I'll try
average rate of change = speed = distance/time
the average rate of change between x = 6 seconds and x = 4 seconds =
distance travelled between 4 to 6 seconds/(6-4 seconds)
= [f(6)-f(4)]/(6-4)

- Vocaloid

and for the second one:
5p = -100 + 3Q^2
all you're doing is solving for Q in terms of p
add 100 to each side
divide each side by 3
take the square root of each side to find Q

- anonymous

35p=q^2
I got 5.9160797830996160425673282915616 when I did the square root of 35

- Vocaloid

??? I think you're confused, can I try outlining it step by step?

- anonymous

sorry I got confused I understand now.

- Vocaloid

|dw:1432846015012:dw|

- anonymous

the answer I got is B

- Vocaloid

yup! good job

- anonymous

|dw:1432846126778:dw|

- anonymous

I have one more. Do you think you can help me?

- anonymous

What is the domain of the following parabola?
x ≥ 2
x ≤ -1
y ≤ 3
All real numbers

##### 1 Attachment

- Vocaloid

are there any x values that don't have y values?

Looking for something else?

Not the answer you are looking for? Search for more explanations.